| abstract |
The invention discloses a compound trimanganese tetraoxide for lithium manganate and an industrial preparation method thereof. The method comprises dry crushing high-purity metal manganese powder to a particle size of 10 μm-300 μm, and then grading the metal manganese powder through classification equipment After dropping into the reactor that has added pure water and ammonium salt, air oxidation, stirring speed 100-500r/min, feed air flow rate is 100-300m 3 /h, add soluble manganese salt after reacting for 20-25 hours, fully Stir, then add bicarbonate, continue to react for 3-5 hours to the end of the reaction, then wash, dry, and roast to obtain a composite trimanganese tetraoxide product, the manganic acid synthesized by the composite trimanganese tetraoxide prepared by the above method Lithium can effectively avoid the occurrence of oxygen defects in the lattice of lithium manganate, improve product performance and consistency, reduce the amount of blown air, and reduce kiln energy consumption. |